Mel Gibson plays a former priest who lost his faith after his wife was killed in a freak car accident. Six months later, he discovers a gigantic crop circle in his yard, similar events happen all over the world. Graham's children think it's aliens, his brother thinks it's pranksters, and Graham doesn't know what to think. The crop circles cause a media frenzy and test Hess's faith as he journeys to find out the truth behind the crop circles. However, as more and more strange events occur, he regains his faith and realizes something big is coming, and it's probably not going to be friendly.